If this is useful, please sticky this for the newbs...
It's worth updating the OS to at least 4.61 as new features and bug fixes are available in this version....I went ahead straight to 4.70, and this is how it's done.
EOS 4.0 through 4.10 users need to load Ultra Prep to enable your sampler to read compressed files. EOS 4.5 users need only to install the new version of EOS 4.6 or EOS 4.7 (flashprep not required).
First of all, you'll need to download these two files to your computer's C drive (make sure it is C and not desktop). Get them off EMU's website under Emulator Ultra Operating Systems
http://www.emu.com/support/files/downlo ... Platform=1
Once the files are downloaded....In Windows, Click Start, then Run and type CMD in the Run box.
A DOS window will open....Make sure the prompt says C:\ If it doesn't, type cd.. and press enter (repeat until the prompt is C:\ )
Now, insert a (good) blank floppy disk in the drive...Make sure it is good by formatting it. Type format a: and press enter
When formatting has finished, type FLASHPRP.exe then press enter. When asked what drive to use, press a.
Take this disk out and label as 'Flash Prep Disk'
Insert another floppy and format it.
When formatting has finished, type EOS470.exe then press enter. When asked what drive to use, press a
Take this disk out and label as 'EOS 4.70'
Put the 'Flash Prep Disk' floppy in the EMU, turn the EMU on and wait....You may have to press the Enter button when the screen is blank to start the upgrade process.
When all disk activity has finished (make sure you give it enough time as disk access is sloooow)....Take the disk out and put in the 'EOS 4.70' disk.
Press Enter to get the update started....I believe the machine will reboot itself when it has finished....
One tip....Whenever disk activity seems to finish or hang, press Enter...For some reason I had to do this a number of times to fully update the OS...The bad thing is, the display doesn't give you any feedback so you have to just guess at what stage the process is at....Saying that, it's not difficult to do and should take no longer than 10 mins.
Goodluck.